It seems like an adjective in those phrases. Hi, we all know that one month has three sections which are defined as early/middle /late +month, for example: Are you sure that 'early' is an adverb?
The Evolution of Jada Pinkett Smith
会议通知中的early bird deadline是什么意思在国际会议的注册通知中，经常会提到一个术语“early bird deadline”，它指的是提前注册的截止日期。设立这个日期的主要目的.
Early是副词，a few hours early不构成词组，是中国式的英语。 请看下面两个例句： i came three hours earlier than the others.
